3 weeks ago same problem happen to me. My S2PRO was making images with a lot of black dots! A disaster!
So i have buyed Sensors Swab for 98 Euro...very expencives (only 12 Swabs) and i have tried to clean my Fuji CCD.
Result? Just some dots disappears but not all and images still remains very bad :-(.
Finally, the only good think to do is: take your camera and send to laboratory, they use a special procedure to clean the CCD, and infact now is perfect! And only with 60 EURO :-(.
So for the future: 1)i will make a lot of attention changing lens
2) Always have lens cleaned
3) Don't make strange manouvres on CCD, sur is protected but from all? :-)
Is a very dangerous think to clean it manually
4) Take a second camera with me :-)
Sorry for my poor english
ERIK